IMAE02-E3
AE500
Communication
Instruction Manual
RKC INSTRUMENT INC.
®
Digital indicator
with alarm function
All Rights Reserved, Copyright
1999, RKC INSTRUMENT INC.
IMAE02-E3
i-1
Thank you for purchasing the RKC instrument. In order to achieve maximum performance and ensure
proper operation of your new instrument, carefully read all the instructions in this manual. Please
place this manual in a convenient location for easy reference.
SYMBOLS
: This mark indicates important information on installation, handling and operating
procedures.
: This mark indicates supplemental information on installation, handling and
operating procedures.
: This mark indicates where additional information may be located.
z
An external protection device must be installed if failure of this instrument
could result in damage to the instrument, equipment or injury to personnel.
z
All wiring must be completed before power is turned on to prevent electric
shock, fire or damage to instrument and equipment.
z
This instrument must be used in accordance with the specifications to prevent
fire or damage to instrument and equipment.
z
This instrument is not intended for use in locations subject to flammable or
explosive gases.
z
Do not touch high-voltage connections such as power supply terminals, etc.
to avoid electric shock.
z
RKC is not responsible if this instrument is repaired, modified or
disassembled by other than factory-approved personnel. Malfunction can
occur and warranty is void under these conditions.
CAUTION
: This mark indicates precautions that must be taken if there is danger of electric
shock, fire, etc., which could result in loss of life or injury.
: This mark indicates that if these precautions and operating procedures are not
taken, damage to the instrument may result.
: This mark indicates that all precautions should be taken for safe usage.
WARNING
!
WARNING
!
IMAE02-E3
i-2
z
This is a Class A instrument. In a domestic environment, this instrument may cause radio
interference, in which case the user may be required to take adequate measures.
z
This instrument is protected from electric shock by reinforced insulation. Provide
reinforced insulation between the wire for the input signal and the wires for instrument
power supply, source of power and loads.
z
Be sure to provide an appropriate surge control circuit respectively for the following:
- If input/output or signal lines within the building are longer than 30 meters.
- If input/output or signal lines leave the building, regardless the length.
z
This instrument is designed for installation in an enclosed instrumentation panel. All high-
voltage connections such as power supply terminals must be enclosed in the
instrumentation panel to avoid electric shock by operating personnel.
z
All precautions described in this manual should be taken to avoid damage to the
instrument or equipment.
z
All wiring must be in accordance with local codes and regulations.
z
All wiring must be completed before power is turned on to prevent electric shock,
instrument failure, or incorrect action.
The power must be turned off before repairing work for input break and output failure
including replacement of sensor, contactor or SSR, and all wiring must be completed
before power is turned on again.
z
To prevent instrument damage or failure, protect the power line and the input/output lines
from high currents with a protection device such as fuse, circuit breaker, etc.
z
Prevent metal fragments or lead wire scraps from falling inside instrument case to avoid
electric shock, fire or malfunction.
z
Tighten each terminal screw to the specified torque found in the manual to avoid electric
shock, fire or malfunction.
z
For proper operation of this instrument, provide adequate ventilation for heat dispensation.
z
Do not connect wires to unused terminals as this will interfere with proper operation of the
instrument.
z
Turn off the power supply before cleaning the instrument.
z
Do not use a volatile solvent such as paint thinner to clean the instrument. Deformation or
discoloration will occur. Use a soft, dry cloth to remove stains from the instrument.
z
To avoid damage to instrument display, do not rub with an abrasive material or push front
panel with a hard object.
z
Do not connect modular connectors to telephone line.
NOTICE
z
This manual assumes that the reader has a fundamental knowledge of the principles of electricity,
process control, computer technology and communications.
z
The figures, diagrams and numeric values used in this manual are only for purpose of illustration.
z
RKC is not responsible for any damage or injury that is caused as a result of using this instrument,
instrument failure or indirect damage.
z
RKC software is licensed for use with one computer and cannot be modified. This software may
not be duplicated except for backup purposes.
z
Periodic maintenance is required for safe and proper operation of this instrument. Some
components have a limited service life, or characteristics that change over time.
z
Every effort has been made to ensure accuracy of all information contained herein. RKC makes no
warranty expressed or implied, with respect to the accuracy of the information. The information in
this manual is subject to change without prior notice.
z
No portion of this document may be reprinted, modified, copied, transmitted, digitized, stored,
processed or retrieved through any mechanical, electronic, optical or other means without prior
written approval from RKC.
CAUTION
IMAE02-E3
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CONTENTS
Page
1. SPECIFICATIONS ................................................................1
2. WIRING.................................................................................2
3. SETTING FOR COMMUNICATION......................................4
3.1 Transfer to Communication Setting Mode.......................................................4
3.2 Communication Parameter Selection..............................................................5
3.3 Device Address Setting ...................................................................................6
3.4 Communication Speed Setting........................................................................9
3.5 Data bit Configuration Setting .......................................................................11
3.6 Interval Time Setting .....................................................................................13
3.7 Communocation Requirements.....................................................................17
4.PROTOCOL .........................................................................19
4.1 Polling...........................................................................................................19
4.1.1 Porlling procedures...........................................................................................20
4.1.2 Porlling procedure example ..............................................................................23
4.2 Selecting.......................................................................................................24
4. 2.1 Serecting procedures........................................................................................24
4.2.2 Serecting procedures example .........................................................................27
4.3 Communication Identifier List .......................................................................28
5. INPUT RANGE TABLES ....................................................30
6. TROUBLESHOOTING .......................................................34
7. ASCII 7-BIT CODE TABLE ................................................36
IMAE02-E3
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MEMO
IMAE02-E3
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1. SPECIFICATIONS
Interface: Based on RS-485, EIA standard
Connection method: 2-wire system, half-duplex multi-drop connection
Communication distance: 1 km max.
The maximum communication distance will be affected by the
surrounding conditions.
Synchronous method: Start/stop synchronous type
Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps
Data bit configuration: Start bit: 1
Data bit: 7 or 8
Parity bit: Without, Odd or Even
Stop bit: 1 or 2
Protocol: ANSI X3.28 subcategory 2.5, A4
Polling/selecting type
Error control: Vertical parity (With parity bit selected)
Horizontal parity (BCC check)
Communication code: ASCII 7-bit code
Termination resistor: Externally connected
Xon/Xoff control: None
Maximum connections: 32 instruments maximum including a host computer
Signal logic: RS-485
Signal voltage Logic
V (A) - V (B) ≥ 2 V 0 (SPACE)
V (A) - V (B) ≤ -2 V 1 (MARK)
Voltage between V (A) and V (B) is the voltage of (A) terminal for the
(B) terminal.
2
IMAE02-E3
2. WIRING
Connector pin number and signal details
Pin No. Symbol name Symbol
13 Signal ground SG
14 Send data/Receive data T/R (A)
15 Send data/Receive data T/R (B)
Wiring method
z
zz
z
Connection to the RS-485 port of the host computer
SG
T/R
(
B
)
T/R
(
A
)
Host com
p
uter
RS-485
SG
T/R
(
B
)
T/R
(
A
)
y
y
y
31 max.
Paired wire
Shielded twisted
pair wire
AE500
Communication
terminal
AE500
Communication
terminal
* R: Termination resistors (Example: 120
Ω
1/2 W)
* R
* R
SG
T/R
(
B
)
T/R
(
A
)
To prevent electric shock or instrument failure, turn off the power before
connecting or disconnecting the instrument and peripheral equipment.
WARNING
!
2. WIRING
IMAE02-E3
3
z
zz
z
Connection to the RS-232C port of the host computer
A RS-232C/RS-485 converter is required.
AE500
SG
T/R (B)
T/R (A)
RS-485
SG
T/R (A)
T/R (B)
RS-232C
Host computer
RS-232C/RS-485
converter
Shielded twisted
pair wire
Paired wire
Communication
terminal
* R * R
* R: Termination resistors (Example: 120
Ω
1/2 W)
When the host computer uses Windows 95/98/NT, use a RS-232C/RS-485 converter with
an automatic send/receive transfer function.
Recommended: CD485, CD485/V manufactured by Data Link, Inc. or equivalent.
The cable is provided by the customer.
Connection with up to 31 AE500 and one host computer
AE500 AE500
Host computerHost computer
RS-232C/RS-485 converter
Junction terminals
3029 311 2 3 4
Device address
RS-485
or
RS-232C
RS-485
4
IMAE02-E3
3. SETTING FOR COMMUNICATION
In order to make communication between the digital indicator AE500 and the host computer, it is
necessary to set the device address, communication speed, data bit configuration and interval time.
Communication settings are made in communication setting mode.
The section in each picture is dimly lit.
3.1 Transfer to Communication Setting Mode
1. Turn on the power to the AE500. Thus, the input type and PV display change in this order.
2. Pressing the SET key while the shift key is being pressed when PV display is being displayed
selects communication setting mode. In this mode, device address Add are displayed in the first
place.
In order to terminate the communication setting mode, press the SET key while pressing the shift
key. After the communication setting mode terminates, the display changes to the PV display.
Communication setting mode
SET
SET
ALM4
ALM1 ALM2 ALM3
PV display
Device address
ALM4
ALM1 ALM2 ALM3
3. SETTING FOR COMUNICATION
IMAE02-E3
5
3.2 Communication Parameter Selection
Parameters in communication setting mode are selected in the order of device address Add,
communication speed bPS, data bit configuration bIT and interval time set value InT. Each parameter
is selected by pressing the SET key.
Display flowchart
Input type display
Power on
(Display for approx. 4 sec)
Display changes automatically
PV display
Press the SET key while pressing the shift key.
Device address
(add)
Communication speed
(bPS)
Data bit configuration
Interval time set value
(InT)
Press the
SET key.
Press the SET key
while pressing the
shift key.
Press the SET key.
Press the SET key.
Press the SET key.
Communication setting mode
PV display
3. SETTING FOR COMMUNICATION
IMAE02-E3
6
3.3 Device Address Setting
Set the device address by using numerals from 0 to 99. Press the UP or DOWN key to change the
numeral, and also press the shift key to shift the digit.
Symbol Name Setting range Description
Factory
set value
Device address 0 to 99 Sets the AE500 device address. 0
Add
When the communication parameter was changed, always turn on the power again.
Otherwise, no communication is performed by using the changed value.
If key operation is not performed for more than 1 minute without pressing the SET key after
the device address is set, the AE500 is automatically changed to PV display. In this case, the
set device address returns to the value before the setting is changed.
Setting procedure
Example: When setting device address to 15.
1. Change the AE500 to communication setting mode, and then display the device address
For details, see the 3.1 Transfer to Communication Setting Mode (P. 4) and 3.2
Communication Parameter Selection (P. 5).
Continued on the next page.
SET
ALM4ALM1 ALM2
ALM3
Device address
3. SETTING FOR COMUNICATION
IMAE02-E3
7
2. Press the shift key to change the display from character to set value.
3. Set the device address. Press the UP key to enter 5 in the lowest digit.
4. Press the shift key to brightly light the tens digit.
Continued on the next page.
SET
ALM4ALM1 ALM2
ALM3
SET
ALM4ALM1 ALM2
ALM3
SET
ALM4ALM1 ALM2
ALM3
SET
Character display of device address Set value display of device address
ALM4ALM1 ALM2
ALM3
3. SETTING FOR COMMUNICATION
IMAE02-E3
8
5. Press the UP key to enter 1 in the tens digit.
6. Press the SET key to select the next communication parameter “Communication speed (bPS).”
As a result, the set device address is registered.
SET
ALM4ALM1 ALM2
ALM3
3. SETTING FOR COMUNICATION
IMAE02-E3
9
3.4 Communication Speed Setting
Set a communication speed of 2400 bps, 4800 bps, 9600 bps or 19200 bps by using numerals from 0
to 3. Press the UP or DOWN key to change the numeral.
Symbol Name Setting range Description
Factory
set value
Communication
speed
0: 2400 bps
1: 4800 bps
2: 9600 bps
Selects the communication
speed.
2
bPS
3: 19200 bps
Set the same communication speed to both the AE500 and connecting host computer.
When the communication parameter was changed, always turn on the power again.
Otherwise, no communication is performed by using the changed value.
If key operation is not performed for more than 1 minute without pressing the SET key after
the device address is set, the AE500 is automatically changed to PV display. In this case, the
set communication speed returns to the value before the setting is changed.
Setting procedure
Example: When setting communication speed to “1: 4800 bps.”
1. Change the AE500 to communication setting mode, and then display the communication speed.
For details, see the 3.1 Transfer to Communication Setting Mode (P. 4) and 3.2
Communication Parameter Selection (P. 5).
Continued on the next page.
SET
ALM4ALM1 ALM2
ALM3
Communication speed
3. SETTING FOR COMMUNICATION
IMAE02-E3
10
2. Press the shift key to change the display from character to set value.
3. Press the DOWN key to enter 1 in the lowest digit. As a result, a communication speed of 4800
bps is set.
4. Press the SET key to change to the next communication parameter “Data bit configuration (bIT).”As a
result, the set communication speed is registered.
SET
ALM4ALM1 ALM2
ALM3
Character display of
communication speed
Set value display of
communication speed
SET
ALM4ALM1 ALM2
ALM3
SET
ALM4ALM1 ALM2
ALM3
3. SETTING FOR COMUNICATION
IMAE02-E3
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3.5 Data bit Configuration Setting
Set the data bit configuration during communication. Press the UP or DOWN key to change the numeral.
Symbol Name Setting range Description
Factory
set value
Data bit
configuration
0 to 5
See Data bit
configuration table
Selects data bit configuration
during communication.
0
bIT
Data bit configuration table
Setting Data bit [bit] Parity bit Stop bit [bit]
0 8 None 1
1 8 None 2
27 Even 1
37 Even 2
47 Odd 1
57 Odd 2
Set the same data bit configuration to both the AE500 and connecting host computer.
When the communication parameter was changed, always turn on the power again.
Otherwise, no communication is performed by using the changed value.
If key operation is not performed for more than 1 minute without pressing the SET key after
the device address is set, the AE500 is automatically changed to PV display. In this case, the
set data bit construction returns to the value before the setting is changed.
3. SETTING FOR COMMUNICATION
IMAE02-E3
12
Setting procedure
Example: When setting data bit configuration to “1: 8 data bits, no parity bit and 2 stop bits.”
1. Change the AE500 to communication setting mode, and then display the data bit configuration.
For details, see the 3.1 Transfer to Communication Setting Mode (P. 4) and 3.2
Communication Parameter Selection (P. 5).
2. Press the shift key to change the display from character to set value.
3. Press the UP key to enter 1 in the lowest digit. As a result, data bit configuration is set to “8 data
bits, no parity bit and 2 stop bits.”
4. Press the SET key to change to the next communication parameter “Interval time set value
(InT).”
As a result, the set data configuration is registered.
SET
ALM4ALM1 ALM2
ALM3
Data bit configuration
SET
ALM4ALM1 ALM2
ALM3
Character display of data bit configuration
Set value display of data bit configuration
SET
ALM4ALM1 ALM2
ALM3
SET
ALM4ALM1 ALM2
ALM3
3. SETTING FOR COMUNICATION
IMAE02-E3
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3.6 Interval Time Setting
Set the interval time. Press the UP or DOWN key to change the numeral, and press the shift key to
shift the digit.
Symbol Name Setting range Description
Factory
set value
Interval time set
value
0 to 150
*
Sets the value to set the
interval time.
5
InT
* Can be set up to 250 ms if converted to interval time.
Equations for calculating interval time and interval time set value
Equations :
Interval time = Interval time set value
×
1.666 ms
Interval time set value = Interval time
÷
1.666 ms
When the communication parameter was changed, always turn on the power again.
Otherwise, no communication is performed by using the changed value.
If key operation is not performed for more than 1 minute without pressing the SET key after
the device address is set, the AE500 is automatically changed to PV display. In this case, the
set interval time set value returns to the value before the setting is changed.
Setting procedure
Example: When setting interval time to 250 ms.
1. Change the AE500 to communication setting mode, and then display the interval time set value
For details, see the 3.1 Transfer to Communication Setting Mode (P. 4) and 3.2
Communication Parameter Selection (P. 5).
Continued on the next page.
SET
ALM4ALM1 ALM2
ALM3
Interval time
3. SETTING FOR COMMUNICATION
IMAE02-E3
14
2. Press the shift key to change the display from character to set value.
3. Here, as an interval time of 250 ms needs to be set, calculate the interval time set value using the
equation.
For the equation, see the Equations for calculating interval time and interval time set
value (P. 13).
Interval time set value:
250 ms ÷ 1.666 ms 150 (Round to the nearest whole number.)
Interval time:
150 × 1.666 ms 249.9 (Approx. 250 ms)
Thus, enter an interval time set value of 150 calculated from the above by pressing the UP or
DOWN key at the front of the AE500.
4. Press the DOWN key to enter 0 in the lowest digit.
Continued on the next page.
SET
ALM4ALM1 ALM2
ALM3
SET
Character display of interval time Set value display of interval time
ALM4ALM1 ALM2
ALM3
SET
ALM4ALM1 ALM2
ALM3
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